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zeroxfe 11 hours ago

I've been using this model (as a coding agent) for the past few days, and it's the first time I've felt that an open source model really competes with the big labs. So far it's been able to handle most things I've thrown at it. I'm almost hesitant to say that this is as good as Opus.

timwheeler 37 minutes ago | parent | next [-]

Did you use Kimi Code or some other harness? I used it with OpenCode and it was bumbling around through some tasks that Claude handles with ease.

rubslopes 5 hours ago | parent | prev | next [-]

Also my experience. I've been going back and forth between Opus and Kimi for the last few days, and, at least for my CRUD webapps, I would say they are both on the same level.

armcat 11 hours ago | parent | prev | next [-]

Out of curiosity, what kind of specs do you have (GPU / RAM)? I saw the requirements and it's a beyond my budget so I am "stuck" with smaller Qwen coders.

zeroxfe 10 hours ago | parent | next [-]

I'm not running it locally (it's gigantic!) I'm using the API at https://platform.moonshot.ai

BeetleB 10 hours ago | parent | next [-]

Just curious - how does it compare to GLM 4.7? Ever since they gave the $28/year deal, I've been using it for personal projects and am very happy with it (via opencode).

https://z.ai/subscribe

InsideOutSanta 10 hours ago | parent | next [-]

There's no comparison. GLM 4.7 is fine and reasonably competent at writing code, but K2.5 is right up there with something like Sonnet 4.5. it's the first time I can use an open-source model and not immediately tell the difference between it and top-end models from Anthropic and OpenAI.

5 hours ago | parent [-]
[deleted]
zeroxfe 10 hours ago | parent | prev | next [-]

It's waaay better than GLM 4.7 (which was the open model I was using earlier)! Kimi was able to quickly and smoothly finish some very complex tasks that GLM completely choked at.

segmondy 9 hours ago | parent | prev | next [-]

The old Kimi K2 is better than GLM4.7

cmrdporcupine 10 hours ago | parent | prev | next [-]

From what people say, it's better than GLM 4.7 (and I guess DeepSeek 3.2)

But it's also like... 10x the price per output token on any of the providers I've looked at.

I don't feel it's 10x the value. It's still much cheaper than paying by the token for Sonnet or Opus, but if you have a subscribed plan from the Big 3 (OpenAI, Anthropic, Google) it's much better value for $$.

Comes down to ethical or openness reasons to use it I guess.

esafak 9 hours ago | parent [-]

Exactly. For the price it has to beat Claude and GPT, unless you have budget for both. I just let GLM solve whatever it can and reserve my Claude budget for the rest.

akudha 10 hours ago | parent | prev [-]

Is the Lite plan enough for your projects?

BeetleB 9 hours ago | parent [-]

Very much so. I'm using it for small personal stuff on my home PC. Nothing grand. Not having to worry about token usage has been great (previously was paying per API use).

I haven't stress tested it with anything large. Both at work and home, I don't give much free rein to the AI (e.g. I examine and approve all code changes).

Lite plan doesn't have vision, so you cannot copy/paste an image there. But I can always switch models when I need to.

rc1 9 hours ago | parent | prev [-]

How long until this can be run on consumer grade hardware or a domestic electricity supply I wonder.

Anyone have a projection?

johndough 9 hours ago | parent | next [-]

You can run it on consumer grade hardware right now, but it will be rather slow. NVMe SSDs these days have a read speed of 7 GB/s (EDIT: or even faster than that! Thank you @hedgehog for the update), so it will give you one token roughly every three seconds while crunching through the 32 billion active parameters, which are natively quantized to 4 bit each. If you want to run it faster, you have to spend more money.

Some people in the localllama subreddit have built systems which run large models at more decent speeds: https://www.reddit.com/r/LocalLLaMA/

hedgehog 8 hours ago | parent [-]

High end consumer SSDs can do closer to 15 GB/s, though only with PCI-e gen 5. On a motherboard with two m.2 slots that's potentially around 30GB/s from disk. Edit: How fast everything is depends on how much data needs to get loaded from disk which is not always everything on MoE models.

greenavocado 5 hours ago | parent [-]

Would RAID zero help here?

hedgehog 5 hours ago | parent [-]

Yes, RAID 0 or 1 could both work in this case to combine the disks. You would want to check the bus topology for the specific motherboard to make sure the slots aren't on the other side of a hub or something like that.

segmondy 9 hours ago | parent | prev | next [-]

You can run it on a mac studio with 512gb ram, that's the easiest way. I run it at home on a multi rig GPU with partial offload to ram.

johndough 8 hours ago | parent [-]

I was wondering whether multiple GPUs make it go appreciably faster when limited by VRAM. Do you have some tokens/sec numbers for text generation?

heliumtera 9 hours ago | parent | prev [-]

You need 600gb of VRAM + MEMORY (+ DISK) to fit the model (full) or 240 for the 1b quantized model. Of course this will be slow.

Through moonshot api it is pretty fast (much much much faster than Gemini 3 pro and Claude sonnet, probably faster than Gemini flash), though. To get similar experience they say at least 4xH200.

If you don't mind running it super slow, you still need around 600gb of VRAM + fast RAM.

It's already possible to run 4xH200 in a domestic environment (it would be instantaneous for most tasks, unbelievable speed). It's just very very expensive and probably challenging for most users, manageable/easy for the average hacker news crowd.

Expensive AND hard to source high end GPUs, if you manage to source for the old prices around 200 thousand dollars to get maximum speed I guess, you could probably run decently on a bunch of high end machines, for let's say, 40k (slow).

Carrok 11 hours ago | parent | prev | next [-]

Not OP but OpenCode and DeepInfra seems like an easy way.

observationist 6 hours ago | parent | prev | next [-]

API costs on these big models over private hosts tend to be a lot less than API calls to the big 4 American platforms. You definitely get more bang for your buck.

tgrowazay 10 hours ago | parent | prev [-]

Just pick up any >240GB VRAM GPU off your local BestBuy to run a quantized version.

> The full Kimi K2.5 model is 630GB and typically requires at least 4× H200 GPUs.

CamperBob2 8 hours ago | parent [-]

You could run the full, unquantized model at high speed with 8 RTX 6000 Blackwell boards.

I don't see a way to put together a decent system of that scale for less than $100K, given RAM and SSD prices. A system with 4x H200s would cost more like $200K.

ttul 44 minutes ago | parent [-]

That would be quite the space heater, too!

thesurlydev 11 hours ago | parent | prev [-]

Can you share how you're running it?

eknkc 10 hours ago | parent | next [-]

I've been using it with opencode. You can either use your kimi code subscription (flat fee), moonshot.ai api key (per token) or openrouter to access it. OpenCode works beautifully with the model.

Edit: as a side note, I only installed opencode to try this model and I gotta say it is pretty good. Did not think it'd be as good as claude code but its just fine. Been using it with codex too.

Imustaskforhelp 10 hours ago | parent [-]

I tried to use opencode for kimi k2.5 too but recently they changed their pricing from 200 tool requests/5 hour to token based pricing.

I can only speak from the tool request based but for some reason anecdotally opencode took like 10 requests in like 3-4 minutes where Kimi cli took 2-3

So I personally like/stick with the kimi cli for kimi coding. I haven't tested it out again with OpenAI with teh new token based pricing but I do think that opencode might add more token issue.

Kimi Cli's pretty good too imo. You should check it out!

https://github.com/MoonshotAI/kimi-cli

nl 7 hours ago | parent [-]

I like Kimi-cli but it does leak memory.

I was using it for multi-hour tasks scripted via an self-written orchestrator on a small VM and ended up switching away from it because it would run slower and slower over time.

JumpCrisscross 6 hours ago | parent | prev | next [-]

> Can you share how you're running it?

Not OP, but I've been running it through Kagi [1]. Their AI offering is probably the best-kept secret in the market.

[1] https://help.kagi.com/kagi/ai/assistant.html

deaux 2 hours ago | parent [-]

Doesn't list Kimi 2.5 and seems to be chat-only, not API, correct?

zeroxfe 10 hours ago | parent | prev | next [-]

Running it via https://platform.moonshot.ai -- using OpenCode. They have super cheap monthly plans at kimi.com too, but I'm not using it because I already have codex and claude monthly plans.

esafak 9 hours ago | parent | next [-]

Where? https://www.kimi.com/code starts at $19/month, which is same as the big boys.

UncleOxidant 10 hours ago | parent | prev [-]

so there's a free plan at moonshot.ai that gives you some number of tokens without paying?

indigodaddy 5 hours ago | parent | prev | next [-]

Been using K2.5 Thinking via Nano-GPT subscription and `nanocode run` and it's working quite nicely. No issues with Tool Calling so far.

explorigin 11 hours ago | parent | prev | next [-]

https://unsloth.ai/docs/models/kimi-k2.5

Requirements are listed.

KolmogorovComp 10 hours ago | parent [-]

To save everyone a click

> The 1.8-bit (UD-TQ1_0) quant will run on a single 24GB GPU if you offload all MoE layers to system RAM (or a fast SSD). With ~256GB RAM, expect ~10 tokens/s. The full Kimi K2.5 model is 630GB and typically requires at least 4× H200 GPUs. If the model fits, you will get >40 tokens/s when using a B200. To run the model in near full precision, you can use the 4-bit or 5-bit quants. You can use any higher just to be safe. For strong performance, aim for >240GB of unified memory (or combined RAM+VRAM) to reach 10+ tokens/s. If you’re below that, it'll work but speed will drop (llama.cpp can still run via mmap/disk offload) and may fall from ~10 tokens/s to <2 token/s. We recommend UD-Q2_K_XL (375GB) as a good size/quality balance. Best rule of thumb: RAM+VRAM ≈ the quant size; otherwise it’ll still work, just slower due to offloading.

Gracana 10 hours ago | parent [-]

I'm running the Q4_K_M quant on a xeon with 7x A4000s and I'm getting about 8 tok/s with small context (16k). I need to do more tuning, I think I can get more out of it, but it's never gonna be fast on this suboptimal machine.

segmondy 9 hours ago | parent | next [-]

you can add 1 more GPU so you can take advantage of tensor parallel. I get the same speed with 5 3090's with most of the model on 2400mhz ddr4 ram, 8.5tk almost constant. I don't really do agents but chat, and it holds up to 64k.

Gracana 8 hours ago | parent [-]

That is a very good point and I would love to do it, but I built this machine in a desktop case and the motherboard has seven slots. I did a custom water cooling manifold just to make it work with all the cards.

I'm trying to figure out how to add another card on a riser hanging off a slimsas port, or maybe I could turn the bottom slot into two vertical slots.. the case (fractal meshify 2 xl) has room for a vertical mounted card that wouldn't interfere with the others, but I'd need to make a custom riser with two slots on it to make it work. I dunno, it's possible!

I also have an RTX Pro 6000 Blackwell and an RTX 5000 Ada.. I'd be better off pulling all the A7000s and throwing both of those cards in this machine, but then I wouldn't have anything for my desktop. Decisions, decisions!

esafak 9 hours ago | parent | prev [-]

The pitiful state of GPUs. $10K for a sloth with no memory.

gigatexal 11 hours ago | parent | prev [-]

Yeah I too am curious. Because Claude code is so good and the ecosystem so just it works that I’m Willing to pay them.

epolanski 10 hours ago | parent | next [-]

You can plug another model in place of Anthropic ones in Claude Code.

miroljub 8 hours ago | parent | next [-]

If you don't use Antrophic models there's no reason to use Claude Code at all. Opencode gives so much more choice.

zeroxfe 10 hours ago | parent | prev [-]

That tends to work quite poorly because Claude Code does not use standard completions APIs. I tried it with Kimi, using litellm[proxy], and it failed in too many places.

AnonymousPlanet 9 hours ago | parent | next [-]

It worked very well for me using qwen3 coder behind a litellm. Most other models just fail in weird ways though.

samtheprogram 9 hours ago | parent | prev [-]

opencode is a good alternative that doesnt flake out in this way.

Imustaskforhelp 10 hours ago | parent | prev [-]

I tried kimi k2.5 and first I didn't really like it. I was critical of it but then I started liking it. Also, the model has kind of replaced how I use chatgpt too & I really love kimi 2.5 the most right now (although gemini models come close too)

To be honest, I do feel like kimi k2.5 is the best open source model. It's not the best model itself right now tho but its really price performant and for many use cases might be nice depending on it.

It might not be the completely SOTA that people say but it comes pretty close and its open source and I trust the open source part because I feel like other providers can also run it and just about a lot of other things too (also considering that iirc chatgpt recently slashed some old models)

I really appreciate kimi for still open sourcing their complete SOTA and then releasing some research papers on top of them unlike Qwen which has closed source its complete SOTA.

Thank you Kimi!